Asian Plantain (Plantago asiatica) has a long history of use in traditional Chinese medicine (TCM) and other East Asian herbal systems. It is commonly included in formulas for clearing heat, draining dampness, and promoting the flow of bodily fluids, which in TCM theory is related to resolving phlegm and relieving congestion, including sinus congestion. The seeds and leaves are used in decoctions or teas for a variety of respiratory complaints, such as coughs and nasal congestion, and are believed to possess anti-inflammatory and expectorant properties according to traditional texts.

However, the direct scientific evidence supporting the efficacy of Asian Plantain specifically for sinus congestion is very limited. While some pharmacological studies have demonstrated anti-inflammatory and antimicrobial effects of Plantago asiatica extracts, most research focuses on its use for urinary or gastrointestinal conditions, rather than respiratory or sinus issues. One review (PMCID: PMC3665023) highlights its traditional uses and bioactive compounds, but does not provide robust clinical data for sinus congestion. Thus, the use of Asian Plantain for this purpose is primarily based on tradition rather than strong scientific validation.